On 27.10.2014, at 04:27, Dirk Hohndel <[email protected]> wrote: Good morning,
> Robert appears to have stepped up to help our Willem to get this right,
> but the more people work on this and help figure out what's the right way
> to do things, the better.
indeed, more people needed here. I cannot say I have any sort of overview about
the recently added CCR functionality. I have only only spent some time on
debugging to make sure features that worked before got unbroken again. And of
course, I don’t dive rebreathers myself (currently I am not diving anything
unfortunately, stupid flu!) so all my knowledge is from hearsay anyway.
Re the compression thing: I agree it should not be in memory, only when saving
files. And then repeated values should be omitted rather than set to zero as
zero has a special meaning: Zero set point indicates that we are on OC and
shortcuts all CCR calculations.
BTW, another thing that need some looking after (for which I did not have time,
yet) is when we calculate SAC rates: For the PSCR code, that I submitted on
Friday, the steady state value of pO2 depends (amongst other things) on the
current SAC. But often enough (at least when I was testing) it had not yet been
calculated so the pO2 calculation has to resort to the default value (see the
first if() in the code). My impression is that in many cases, there should be
enough data to have a SAC but we only calculate it later in the code path. This
is particularly bad, since we have two different default values for SAC, one
for bottom time and one for deco, except that for real dives (those downloaded
from dive computers) this distinction does not make sense.
Best
Robert
--
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Robert C. Helling Elite Master Course Theoretical and Mathematical Physics
Scientific Coordinator
Ludwig Maximilians Universitaet Muenchen, Dept. Physik
Phone: +49 89 2180-4523 Theresienstr. 39, rm. B339
http://www.atdotde.de
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